CN111571941B

CN111571941B - Injection mold

Info

Publication number: CN111571941B
Application number: CN202010398744.9A
Authority: CN
Inventors: 曹文乐; 杨祥; 邹宝华; 王文龙
Original assignee: Jiangsu Echom Science & Technology Co ltd
Current assignee: Jiangsu Echom Science & Technology Co ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2022-07-12
Anticipated expiration: 2040-05-12
Also published as: CN111571941A

Abstract

The invention relates to the technical field of electric appliance shell manufacturing, and discloses an injection mold. The injection mold comprises a hot runner assembly, a male mold assembly and a female mold assembly which are sequentially arranged along a first direction, a push plate assembly and an inclined top, the push plate assembly is sleeved on the male mold assembly and is movably connected with the male mold assembly, the push plate assembly is used for pushing a workpiece along the first direction, an inclined top guide seat extending along a second direction is convexly arranged on the inner wall of the push plate assembly, and the second direction is perpendicular to the first direction; and the oblique ejector is arranged at an included angle with the first direction, one end of the oblique ejector, which is close to the female die assembly, is provided with a clamping part for forming a workpiece, and the other end of the oblique ejector is in sliding fit with the oblique ejector guide seat. The novel injection mold is simple in structure, low in cost and high in workpiece qualification rate.

Description

Injection mold

Technical Field

The invention relates to the technical field of electric appliance shell manufacturing, in particular to an injection mold.

Background

The front housing of the tv, display, etc. is a frame-like structure, and is usually formed by injection molding. The inboard edge of the preceding shell of TV set is provided with the draw-in groove that is used for the assembly, and when injection moulding, the draw-in groove needs be provided with the oblique top cooperation common shaping of buckle through the public mould benevolence of connection on public mould, the female mould benevolence of connection on female membrane and tip.

In order to remove the molded front shell from the core insert and the lifter, the lifter needs to move along with the ejection structure along the direction perpendicular to the parting plane so as to enable the workpiece to leave the core insert, and the lifter needs to move along the direction parallel to the parting plane so as to extend out of the molded clamping groove so as to completely leave the workpiece. In the prior art, the inclined top is usually fixed by a fixing plate which is arranged independently, so that the thickness of the whole mould is increased, the cost is increased, the length of a hot runner assembly is correspondingly increased, the problem that molten plastic is easy to carbonize and cool is caused, and the product percent of pass is influenced; on the other hand, the connection structure of the pitched roof and the fixed plate is complex and is not easy to operate.

Therefore, it is desirable to invent an injection mold to solve the above problems.

Disclosure of Invention

The invention aims to provide an injection mold which is simple in structure, low in cost and high in workpiece qualification rate.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an injection mold, include the public mould subassembly and the master model subassembly that set gradually along the first direction, can the lock, still include:

the push plate component is sleeved on the male die component and movably connected with the male die component, the push plate component is used for pushing a workpiece along the first direction, an inclined top guide seat extending along a second direction is convexly arranged on the inner wall of the push plate component, and the second direction is perpendicular to the first direction;

and the oblique ejector is arranged at an included angle with the first direction, one end of the oblique ejector, which is close to the female die assembly, is provided with a buckling part for forming a workpiece, and the other end of the oblique ejector is in sliding fit with the oblique ejector guide seat.

Optionally, a guide hole is formed in the pitched roof, and the guide hole is sleeved on the pitched roof guide seat and is in sliding fit with the pitched roof guide seat.

Optionally, the pitched roof pilot block comprises:

a connection part connected to the push plate assembly by a bolt;

and the guide part is connected to the connecting part and extends along the second direction, and the guide part is in sliding fit with the guide hole.

Optionally, the male mold assembly comprises:

one side of the male template is fixedly connected with the hot runner assembly, and the push plate assembly is movably connected with the male template;

and the male die core is connected to the other side of the male template and matched with the female die assembly to form an accommodating cavity.

Optionally, the core insert is provided with a guide slot hole parallel to the lifter, and the lifter is in sliding fit with the guide slot hole.

Optionally, the push plate assembly comprises:

the ejector guide seat is connected to one side of the ejector body close to the male template;

and the push block is connected to one side of the push plate assembly close to the female die assembly and used for pushing the workpiece.

Optionally, the periphery of the male template close to one side of the male mold core is provided with an avoiding groove, and the inclined top guide seat can be accommodated in the avoiding groove.

Optionally, the injection mold further comprises a driving assembly disposed on the male mold assembly, and an output end of the driving assembly is connected to the push plate assembly and can drive the push plate assembly to move along the first direction.

Optionally, the injection mold further includes a limiting member, the limiting member is disposed through the push plate assembly and connected to the male mold assembly, and the limiting member is configured to limit a position of the push plate assembly along the first direction.

Optionally, the stopper includes:

the penetrating part penetrates through the push plate assembly, and one end of the penetrating part is connected with the male die assembly;

the stop portion is connected to the other end of the penetrating portion, the cross-sectional area of the stop portion is larger than that of the penetrating portion, and the stop portion is configured to stop the push plate assembly from moving towards the female die assembly along the first direction.

The invention has the beneficial effects that:

according to the injection mold, after the male mold component and the female mold component are separated, a workpiece is attached to the male mold component, the push plate component pushes the workpiece along the first direction, so that the workpiece is separated from the male mold component along the first direction, and the inclined top and the first direction form an included angle. The inclined top guide seat is arranged on the inner wall of the push plate assembly, so that a connecting plate structure is not needed, the size of the whole injection mold along the first direction can be shortened, the cost can be saved, the length of the hot runner assembly is correspondingly shortened, and the qualification rate of products is favorably improved; in addition, the pitched roof is in sliding fit with the pitched roof guide seat, so that smooth movement in the demoulding process can be ensured, and the structure is easy to realize. The novel injection mold is simple in structure, low in cost and high in workpiece qualification rate.

Drawings

FIG. 1 is a schematic sectional view of a closed state of a male mold component and a female mold component of an injection mold according to an embodiment of the present invention;

FIG. 2 is an exploded view of an injection mold provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic structural view of a pitched roof guide block and a pitched roof according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a push plate assembly according to an embodiment of the present invention in a state of ejecting a workpiece;

fig. 5 is an enlarged view at a in fig. 4.

In the figure:

100-a workpiece;

1-a hot runner assembly;

2-male mould components; 21-a male template; 211-avoidance slot; 22-core insert; 221-a guide slot hole;

3-a master mold assembly; 31-a master template; 32-cavity insert;

4-a push plate assembly; 41-push plate body; 42-a push block;

5-a slanted ejecting guide seat; 51-a connecting portion; 52-a guide;

6-pitched roof; 61-a snap-fit portion; 62-a guide hole;

7-a drive assembly;

8-a limiting member; 81-a penetration part; 82-a stop;

91-a panel; 92-bottom plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

In the prior art, an inclined top of an injection mold for producing front shells of television sets, displays and other electric appliances is usually fixed by independently arranging a fixing plate, so that not only is the cost increased, but also the length of a hot runner assembly is correspondingly increased, and the product percent of pass is influenced; in addition, the fixing structure of the pitched roof is complex and is not easy to operate.

This embodiment provides an injection mold to above-mentioned problem, and it can be used to electrical apparatus casing and makes technical field, is particularly useful for the shaping of TV set front cover. As shown in fig. 1, the X direction in the drawing is a first direction, the injection mold includes a hot runner assembly 1 sequentially arranged along the first direction, a male mold assembly 2 and a female mold assembly 3 that can be fastened, and further includes a push plate assembly 4 and an inclined top 6, wherein the push plate assembly 4 is sleeved on the male mold assembly 2 and movably connected with the male mold assembly 2, the push plate assembly 4 is used for pushing a workpiece 100 along the first direction, an inclined top guide seat 55 extending along a second direction is convexly arranged on an inner wall of the push plate assembly 4, the second direction is perpendicular to the first direction, the inclined top 6 and the first direction are arranged at an included angle, one end of the inclined top 6, which is close to the female mold assembly 3, is provided with a buckling part 61 for molding the workpiece 100, and the other end is in sliding fit with the inclined top guide seat 55.

In the embodiment, the workpiece 100 is in an annular structure, after the workpiece 100 is subjected to injection molding, the injection molding machine drives the male die assembly 2 to move along a first direction so as to be separated from the female die assembly 3, and the workpiece 100 is attached to the male die assembly 2 and the inclined top 6; next, the push plate assembly 4 pushes the edge of the workpiece 100 along the first direction, so that the workpiece 100 is separated from the male die assembly 2 along the first direction, and the lifter 6 is disposed at an included angle with the first direction, so that the lifter 6 slides on the lifter guide seat 55 along the second direction in the process of moving along the first direction synchronously with the push plate assembly 4, that is, moves along the second direction relative to the workpiece 100, so that the buckling part 61 of the lifter 6 is separated from the workpiece 100 along the second direction, and the demolding process of the workpiece 100 is realized. The inclined top guide seat 55 is arranged on the inner wall of the push plate component 4, so that a connecting plate structure is not needed, the size of the whole injection mold along the first direction can be shortened, the cost can be saved, the length of the hot runner component 1 is correspondingly shortened, and the product qualification rate is favorably improved; in addition, the pitched roof 6 is in sliding fit with the pitched roof guide seat 55, the smooth movement of the demoulding process can be ensured, and the connection structure is easy to realize. The injection mold is simple in structure, low in cost and high in workpiece 100 qualification rate. Of course, it can be understood that for some workpieces, the ejector sleeve needs to be arranged on the die for molding and the ejector pin needs to be arranged for assisting in demolding, the ejector sleeve and the ejector pin can be fixed through the inclined ejection guide seat arranged on the inner wall of the push plate assembly, only the ejector sleeve and the ejector pin are fixedly connected with the inclined ejection guide seat, the whole thickness of the die can be greatly reduced, the cost is reduced, and the qualified rate of the workpieces is improved.

Specifically, as shown in fig. 2, the male mold assembly 2 includes a male mold plate 21 and a male mold core 22, wherein one side of the male mold plate 21 is fixedly connected to the hot runner assembly 1, the other side is connected to the male mold core 22, and the male mold core 22 is used for cooperating with the female mold assembly 3 to form a cavity of a molded workpiece. In this embodiment, the connection is performed by bolts. The male mold plate 21 plays a role of fixing and supporting, the male mold core 22 is arranged according to the actual shape of the workpiece 100, and the male mold core 22 and the workpiece 100 are separately arranged, so that the processing is facilitated on the one hand, and on the other hand, for the similar workpieces 100 with smaller differences, the injection mold can only replace the male mold core 22, so that the manufacturing cost of the mold can be reduced. Preferably, in the present embodiment, the cavity assembly 3 includes a cavity insert 32 and a cavity plate 31, the cavity insert 32 is used to form a cavity of the workpiece 100 together with the core insert 22 and the lifter 6, and the cavity plate 31 is used to fixedly support the cavity insert 32. Further, the injection mold further comprises a panel 91 and a bottom plate 92, wherein the panel 91 is connected with the mother mold plate 31, and the bottom plate 92 is connected with the hot runner assembly 1. In this embodiment, the number of the lifter 6 and the lifter guide 55 may be plural, and the number may be set according to the actual requirement of the workpiece 100.

Preferably, as shown in fig. 3, the lifter 6 is provided with a guide hole 62, and the guide hole 62 is sleeved on the lifter guide seat 55 and is in sliding fit with the lifter guide seat 55. The guide hole 62 is sleeved on the pitched roof guide seat 55, so that the pitched roof 6 can move along the second direction relatively to the pitched roof guide seat 55, no other accessory auxiliary connection is required, the structure is simple, and the manufacturing cost is low.

Further, in order to realize the connection of the slanted ejecting guide 55 and the male mold unit 2, as shown in fig. 3, the slanted ejecting guide 55 includes a connecting portion 51 and a guiding portion 52, wherein the connecting portion 51 is connected to the push plate unit 4 by bolts, the guiding portion 52 is connected to the connecting portion 51 and extends in the second direction, and the guiding portion 52 is slidably fitted into the guiding hole 62. The inclined top guide seat 55 is fixed by bolts, and is convenient to install, disassemble and operate. Specifically, in the present embodiment, the guide hole 62 has a rectangular structure adapted to the cross section of the guide portion 52, and the rectangular structure not only can guide the lifter 6 in the second direction, but also can prevent the lifter 6 from swinging in other directions.

In order to ensure that the lifter 6 moves stably and accurately in the first direction and the second direction without shaking, as shown in fig. 4 and 5, the core insert 22 is provided with a guide slot 221 parallel to the lifter 6, and the lifter 6 is slidably engaged with the guide slot 221. Under the effect of guide slot hole 221, can keep inclination not to change throughout in the whole motion process of oblique top 6, not only guarantee the accurate smooth and easy of drawing of patterns process, and can assist the accurate of oblique top 6 to reset, guarantee injection mold work piece 100's when repeated processing uniformity.

Preferably, as shown in fig. 4, the push plate assembly 4 includes a push plate body 41 and a push block 42, the push plate body 41 is sleeved on the core insert 22 and movably connected with the core mold assembly 2, the slanted ejecting guide seat 55 is connected to one side of the push plate body 41 close to the core mold plate 21, the push block 42 is connected to one side of the push plate assembly 4 close to the cavity mold assembly 3, and the push block 42 is used for pushing the workpiece 100. The push plate body 41 functions as a support and a connection, and the push block 42 is used for pushing the workpiece 100 in a first direction to eject the workpiece 100 from the core 22. In this embodiment, when the injection mold is in the closed state, the push plate body 41 abuts against the female mold assembly 3. Optionally, the pushing block 42 is fixedly connected with the pushing plate through a bolt, the pushing block 42 is in an annular structure matched with the shape of the workpiece 100, and the pushing block 42 can be integrally formed by machining or assembled by a plurality of plates.

In order to completely push the workpiece 100 down from the core 22 for demolding, the push plate and the lifter 6 need to have a sufficient stroke along the first direction, and the lifter 6 needs to have a guide slot 221 with a sufficient length, so as shown in fig. 4, an avoiding slot 211 is formed in the periphery of the male mold plate 21 near the core 22, and the lifter guide 55 can be accommodated in the avoiding slot 211. When the injection mold is in a closed state, the inclined top guide seat 55 and the inclined top 6 are located in the avoiding groove 211 at one end matched with the inclined top guide seat 55, so that in the demolding process, the stroke which can be met by the movement of the inclined top guide seat 55 and the inclined top 6 along the first direction can be ensured, the length of the guide groove hole 221 of enough facilities is reserved in the male mold core 22 along the first direction, in addition, the thickness of the whole injection mold cannot be increased, the cost is favorably reduced, and the qualification rate of the workpiece 100 is favorably improved.

Preferably, in order to realize the automatic demolding of the workpiece 100, as shown in fig. 4, the injection mold further comprises a driving assembly 7 disposed on the male mold assembly 2, wherein an output end of the driving assembly 7 is connected to the push plate assembly 4 and can drive the push plate assembly 4 to move along the first direction. The driving component 7 drives the push plate component 4 to move along the first direction, and can simultaneously drive the inclined top 6 to move along the first direction and the second direction, so that the workpiece 100 is demoulded. Specifically, in this embodiment, the driving assembly 7 is an oil cylinder, the oil cylinder is fixed on the male mold plate 21, and the output end of the oil cylinder is connected to the push plate body 41. Of course, in other embodiments, the driving assembly 7 may be other elements capable of outputting linear motion, such as a cylinder.

Preferably, the injection mold further includes a limiting member 8, the limiting member 8 is disposed through the push plate assembly 4 and connected to the male mold assembly 2, and the limiting member 8 is configured to limit a position of the push plate assembly 4 along the first direction. The push plate assembly 4 can be guaranteed to move within a preset stroke by arranging the limiting part 8. Specifically, as shown in fig. 2, the limiting member 8 includes a penetrating portion 81 and a stopping portion 82, the penetrating portion 81 penetrates through the push plate assembly 4, and one end of the penetrating portion 81 is connected to the male mold assembly 2, the stopping portion 82 is connected to the other end of the penetrating portion 81, the cross-sectional area of the stopping portion 82 is larger than that of the penetrating portion 81, and the stopping portion 82 is configured to block the push plate assembly 4 from moving toward the female mold assembly 3 along the first direction. The push plate assembly 4 moves along the first direction under the driving of the driving assembly 7, and stops moving along the first direction after the push plate assembly 4 abuts against the stopping portion 82 of the limiting member 8, so as to limit the push plate assembly 4. In this embodiment, the limiting member 8 is inserted into the push plate body 41 and connected to the core plate 21. Preferably, the limiting member 8 may be a screw, the head of the screw is the stopping portion 82, and the other end of the screw is in threaded connection with the male die plate 21.

The working process of the injection mold of the invention is as follows:

the hot runner assembly 1, the male die assembly 2 and the push plate assembly 4 are separated from the female die assembly 3 along a first direction under the driving of the injection molding machine, and the workpiece 100 is attached to the male die assembly 2; the driving component 7 drives the push plate component 4 to move away from the male die component 2 along the first direction, in the process, the push block 42 pushes the edge part of the workpiece 100 to separate the workpiece 100 from the male die core 22, and simultaneously, the lifter 6 slides relative to the lifter guide seat 55 along the second direction, so that the buckling part 61 of the lifter 6 extends out of the clamping groove of the formed workpiece 100, and the demoulding of the workpiece 100 is realized.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the invention and are not to be construed as limitations of the embodiments of the present invention, but may be modified in various embodiments and applications by those skilled in the art according to the spirit of the present invention, and the content of the present description should not be construed as a limitation of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides an injection mold, its characterized in that includes hot runner assembly (1), public mould subassembly (2) and master model subassembly (3) that can the lock that set gradually along the first direction, still includes:

the push plate component (4) is sleeved on the male die component (2) and is movably connected with the male die component (2), the push plate component (4) is used for pushing a workpiece (100) along the first direction, an inclined top guide seat (5) extending along a second direction is convexly arranged on the inner wall of the push plate component (4), and the second direction is perpendicular to the first direction;

the lifter (6) is arranged at an included angle with the first direction, one end, close to the female die assembly (3), of the lifter (6) is provided with a clamping part (61) used for forming the workpiece (100), and the other end of the lifter is in sliding fit with the lifter guide seat (5);

the inclined top (6) is provided with a guide hole (62), and the guide hole (62) is sleeved on the inclined top guide seat (5) and is in sliding fit with the inclined top guide seat (5);

the pitched roof guide shoe (5) comprises:

a connecting portion (51) connected to the push plate assembly (4) by a bolt;

a guide portion (52) connected to the connecting portion (51) and extending in the second direction, the guide portion (52) being slidably fitted with the guide hole (62);

the male mould assembly (2) comprises:

the hot runner component (1) is fixedly connected with one side of the male template (21), and the push plate component (4) is movably connected with the male template (21);

the core insert (22) is connected to the other side of the male template (21) and is used for being matched with the female die assembly (3) to form an accommodating cavity;

the core insert (22) is provided with a guide slot hole (221) parallel to the inclined top (6), and the inclined top (6) is in sliding fit with the guide slot hole (221).

2. An injection mould according to claim 1, characterized in that the push plate assembly (4) comprises:

the push plate body (41) is sleeved on the male die core (22) and movably connected with the male die assembly (2), and the inclined top guide seat (5) is connected to one side, close to the male die plate (21), of the push plate body (41);

the push block (42) is connected to one side, close to the female die assembly (3), of the push plate assembly (4), and the push block (42) is used for pushing the workpiece (100).

3. An injection mold according to claim 1, wherein the periphery of the core plate (21) on the side close to the core insert (22) is provided with an escape groove (211), and the lifter guide (5) can be accommodated in the escape groove (211).

4. An injection mould according to any one of claims 1-3, further comprising a drive assembly (7) arranged on the male mould component (2), the output of the drive assembly (7) being connected to the push plate assembly (4) and being capable of driving the push plate assembly (4) in the first direction.

5. An injection mould according to any one of claims 1-3, further comprising a stopper (8), wherein the stopper (8) is arranged through the push plate assembly (4) and connected to the male mould assembly (2), and wherein the stopper (8) is configured to limit the position of the push plate assembly (4) along the first direction.

6. An injection mould according to claim 5, characterized in that the stop (8) comprises:

a penetrating part (81) which penetrates through the push plate component (4) and one end of which is connected with the male die component (2);

a stopper (82) connected to the other end of the penetrating portion (81), the stopper (82) having a cross-sectional area larger than the penetrating portion (81), the stopper (82) being configured to block the push plate assembly (4) from moving toward the female die assembly (3) in the first direction.